Home / 21,021.12-29,009.12-11,589.71

Finding the Fourth Proportional to 21,021.12, 29,009.12 and 11,589.71

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Solution

The fourth proportional to 21,021.12, 29,009.12 and 11,589.71 is: 15,993.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.12 : 29,009.12 = 11,589.71 : x
  2. Step 2: Convert to fraction form
    21,021.12/29,009.12 = 11,589.71/x
  3. Step 3: Cross multiply
    21,021.12x = 29,009.12 × 11,589.71
  4. Step 4: Simplify right side
    21,021.12x = 336,207,085.16
  5. Step 5: Solve for x
    x = 336,207,085.16/21,021.12
  6. Step 6: Final answer
    x = 15,993.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.